Fan

ABSTRACT

A fan includes a battery pack coupling portion and an air output assembly including fan blades, a front housing, and a rear housing, where the fan blades are driven by a motor to rotate about a first axis. The fan further includes a pivot assembly connected to the air output assembly, where the air output assembly is rotatable about a second axis of the pivot assembly. The fan further includes a support assembly connected to the pivot assembly for supporting the air output assembly. The maximum distance of the front housing available for air output in an up and down direction is defined as the air output diameter of the fan, and the distance between the first axis and the second axis is defined as a first distance, where the ratio of the first distance to the air output diameter is greater than or equal to 25%.

This application claims the benefit under 35 U.S.C. § 119(a) of ChinesePatent Application No. CN 202210777975.X, filed on Jun. 28, 2022, whichapplication is incorporated herein by reference in its entireties.

BACKGROUND

A fan is a machine that speeds up the flow of air by driving fan bladesto rotate. An energy source of the fan may be a direct current powersupply or an alternating current power supply, and the direct currentpower supply is generally carried by a battery pack and is moreconvenient for a user who does not have easy access to the alternatingcurrent power supply. The fan may be used in a variety of scenarios, anddifferent application scenarios have different requirements for theplacement and air output angle of the fan.

SUMMARY

The fan includes a battery pack coupling portion for mounting a batterypack; an air output assembly including fan blades, where the fan bladesare driven by a motor to rotate about a first axis; the air outputassembly further includes a front housing located on the front side ofthe fan blades, and an airflow flows out from the front housing; and theair output assembly further includes a rear housing located on the rearside of the fan blades, and the airflow flows in from the rear housing;a pivot assembly connected to the air output assembly, where the airoutput assembly is rotatable about a second axis of the pivot assembly;and a support assembly connected to the pivot assembly, where thesupport assembly is capable of supporting the air output assembly. Themaximum distance of the front housing available for air output in an upand down direction is defined as the air output diameter of the fan, andthe distance between the first axis and the second axis is defined as afirst distance, where a ratio of the first distance to the air outputdiameter is greater than or equal to 25%.

In an example, the ratio of the first distance to the air outputdiameter is greater than or equal to 33%.

In an example, the pivot assembly is connected to the bottom of the airoutput assembly, and the second axis is located on the lower side of theair output assembly.

In an example, the pivot assembly is at least partially located betweenthe air output assembly and the battery pack coupling portion.

In an example, the support assembly includes a support rod and a supportmember, the support rod is connected to the pivot assembly, and thesupport member supports the support rod so that the fan is capable ofbeing placed on a placement plane.

In an example, the support assembly includes four support members, wherewhen the fan is placed on the placement plane, a projection of thecenter of gravity of the fan on the placement plane falls within aregion enclosed by the four support members.

In an example, the maximum width of the air output assembly in a leftand right direction is defined as a second distance, and the maximumdistance of the support assembly in the left and right direction isdefined as a third distance, where the second distance is greater thanthe third distance.

In an example, the rated voltage of the battery pack is greater than orequal to 36 V and less than or equal to 56 V.

In an example, the weight of the battery pack is greater than or equalto 0.8 kg and less than or equal to 2.5 kg.

In an example, the battery pack adapted to the fan is also adaptable toother types of power tools other than the fan.

In an example, the battery pack is capable of being mounted into thebattery pack coupling portion from front to back.

In an example, the battery pack is at least partially located on thefront side of the second axis when the battery pack is mounted in thefan.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a fan;

FIG. 2 is a perspective view of a fan with a front housing and a rearhousing removed;

FIG. 3 is an exploded view of a pivot assembly of a fan;

FIG. 4 is a perspective view of a support assembly from one perspective;

FIG. 5 is a perspective view of a support assembly from anotherperspective;

FIG. 6 is a front view of the fan in FIG. 1 ;

FIG. 7 is a front view of a front housing in an example;

FIG. 8 is a bottom view of the fan in FIG. 1 ;

FIG. 9 is a side view of the fan in FIG. 1 ;

FIG. 10 is a side view of the fan in FIG. 9 placed on an inclined planeinclined to a horizontal plane;

FIG. 11 is a side view of an air output assembly of the fan in FIG. 9rotating backward by an angle about a second axis;

FIG. 12 is a side view of an air output assembly of the fan in FIG. 9rotating backward by 90 degrees about a second axis;

FIG. 13 is a side view of an air output assembly of the fan in FIG. 9rotating forward by an angle about a second axis;

FIG. 14 is a side view of an air output assembly of the fan in FIG. 9rotating forward by 90 degrees about a second axis;

FIG. 15 is a side view of the fan in FIG. 12 placed on a placement planeinclined to a horizontal plane; and

FIG. 16 is a side view of the fan in FIG. 14 placed on a placement planeinclined to a horizontal plane.

DETAILED DESCRIPTION

To make solved technical problems, adopted technical solutions, andachieved technical effects of the present application more apparent, thetechnical solutions in examples of the present application are furtherdescribed in detail below in conjunction with the drawings. The examplesdescribed below are part, not all, of the examples of the presentapplication.

In the description of the present application, it is to be noted thatorientations or position relations indicated by terms such as “center”,“upper”, “lower”, “left”, “right”, “front”, and “rear” are based on thedrawings. These orientations or position relations are intended only tofacilitate and simplify the description of the present application andnot to indicate or imply that a device or element referred to must havesuch particular orientations or must be configured or operated in suchparticular orientations. Thus, these orientations or position relationsare not to be construed as limiting the present application. Moreover,the terms “first,” “second,” and the like are used only fordistinguishing between different structures or components and are not tobe construed as indicating or implying relative importance.

The present application discloses a fan 10. As shown in FIGS. 1 to 3 ,the fan 10 includes an air output assembly 100, a pivot assembly 200, abattery pack coupling portion 300, and a support assembly 400.

The air output assembly 100 includes fan blades 140, a front housing 130located on the front side of the fan blades 140 and used for guiding theairflow out, and a rear housing 150 located on the rear side of the fanblades 140 and used for guiding the airflow in. The top of the airoutput assembly 100 includes a grip 110, and an operator can lift thefan 10 by holding the grip 110, thereby moving the position of the fan10. The fan 10 may also be hung for use by the grip 110. A speedregulation knob 120 is disposed on the lower side of the grip 110 andused for adjusting the rotational speed of the fan blades 140.

As shown in FIG. 2 , the fan blades 140 rotate about a first axis 141.In this example, the first axis of the fan blades 140 basicallycoincides with a motor axis of a motor 160, and the fan blades 140 aredirectly driven by the motor 160 to rotate. The motor 160 is disposedright behind the fan blades 140, and the rotation of the fan blades 140can help the motor 160 to dissipate heat. A wire connecting a batterypack 310 to the motor 160 is disposed in a connection structure 170. Inthis example, the connection structure 170 is a housing structure thatis connected to the rear housing 150 and extends from the rear end ofthe motor 160 to the battery pack coupling portion 300. In an example,the connection structure 170 is integrally formed with the rear housing150, or in other words, the connection structure 170 is hidden insidethe rear housing 150 and the wire penetrates through the rear housing150.

The pivot assembly 200 allows the air output assembly 100 to rotateabout a second axis 201, thereby regulating the direction of the airflowflowing out. The battery pack coupling portion 300 is used for mountingthe battery pack 310, so as to supply power to the fan 10. In thisexample, the battery pack coupling portion 300 and the battery pack 310are located on the lower side of the air output assembly 100 and also onthe lower side of the pivot assembly 200 and are connected to the pivotassembly 200. The air output assembly 100 and the battery pack couplingportion 300 are separately disposed on two sides of the pivot assembly200. The pivot assembly is connected to the bottom of the air outputassembly.

As shown in FIGS. 2 and 3 , the pivot assembly 200 may be divided into afirst pivot assembly 210 and a second pivot assembly 220. In thisexample, the first pivot assembly 210 is located at the left end of thepivot assembly 200 and is a knob mechanism, and the second pivotassembly 220 is located at the right end of the pivot assembly 200 andis a fastening mechanism. A first plane 101 perpendicular to the firstaxis 141 is defined.

In conjunction with FIGS. 9, 12, and 14 , the air output assembly 100can rotate forward or backward around the pivot assembly 200. In thisexample, the maximum angle at which the air output assembly 100 canrotate forward or backward around the pivot assembly 200 in a verticalposition shown in FIG. 9 is 90 degrees.

In this example, a pivot knob 211 in the first pivot assembly 210 may beadjusted to at least two positions. When the pivot knob 211 is rotatedto one of the positions, the air output assembly 100 may be rotated; andwhen the pivot knob 211 is rotated to the other position, the air outputassembly 100 cannot be rotated. The “rotation” here means that the airoutput assembly 100 rotates relative to the pivot assembly 200. It is tobe noted that the specific form of the pivot assembly 200 is not limitedand various pivot structures for achieving fan rotation exist in theconventional art.

FIGS. 3 to 5 disclose the specific structure of the support assembly400, where a support rod 420 is connected to the lower end of the airoutput assembly 100 and the pivot assembly 200, and the support rod 420is supported by support members 410. The support assembly 400 forms asupport plane 401. In this example, a plane formed by the lower surfaceof the support members 410 of the support assembly 400 is the supportplane 401. In this example, the outer surface of the front housing 130is basically parallel to the first plane 101. When the fan 10 is in anon-rotating state and placed on a horizontal plane, the first plane 101is perpendicular to the support plane 401.

As shown in FIGS. 4 and 5 , multiple support members 410 may beprovided. In this example, the support members 410 include a firstsupport member 411 located at the left front of the air output assembly100, a second support member 412 located at the right front of the airoutput assembly 100, a third support member 413 located at the left rearof the air output assembly 100, and a fourth support member 414 locatedat the right rear of the air output assembly 100. The four supportmembers 410 enclose a trapezoidal region. It is to be noted that inother examples, multiple support members 410 are integrally formed intoone piece; or several support members 410 may be integrally formed andthen used with other support members 410.

The support rod 420 may be composed of multiple rod portions, such as afirst rod portion 421 connecting the first support member 411 and thethird support member 413, a second rod portion 422 connecting the thirdsupport member 413 and the fourth support member 414, a third rodportion 423 connecting the fourth support member 414 and the secondsupport member 412, a fourth rod portion 424 connecting the firstsupport member 411 and the first pivot assembly 210, and a fifth rodportion 425 connecting the second support member 412 and the secondpivot assembly 220. The five rod portions may be integrally formed; orthe five rod portions may be separately formed and then splicedtogether; or several rod portions may be integrally formed and splicedtogether with other rod portions, which is not limited here.

It is to be understood that the support members 410 may be composed offour support members as in this example or may be composed of more orfewer support members. In some examples, the support members 410 and thesupport rod 420 may be made of the same material such as plastic or maybe made of different materials, for example, the support members 410 aremade of a plastic material and the support rod 420 is made of a metalmaterial. The support members 410 and the support rod 420 may beintegrally formed or separately formed and then mounted together.

FIG. 5 further shows the bottom structure of the battery pack couplingportion 300. In this example, the battery pack coupling portion 300includes a bottom 320 and sidewalls 330, where the left and rightsidewalls 330 and the bottom 320 may enclose the battery pack 310 withinthe battery pack coupling portion 300. This design prevents the batterypack 310 from falling out or slipping off as the rotational angle orposition of the fan 10 changes.

The rated voltage of the battery pack 310 that can be accommodated inthe battery pack coupling portion 300 is greater than or equal to 36 Vand less than or equal to 56 V. In an example, the rated voltage of thebattery pack 310 is 40 V. The weight of the battery pack 310 that can beaccommodated in the battery pack coupling portion 300 is greater than orequal to 0.8 kg and less than or equal to 2.5 kg. The following tablelists information about four battery packs 310 applicable to the fan 10.

TABLE 1 Battery Battery Battery Battery pack 1 pack 2 pack 3 pack 4Rated voltage (V) 40 V 40 V 40 V 40 V Weight (kg) 0.89 kg 1.3 kg 1.37 kg1.88 kg

In conjunction with FIGS. 6 to 8 , when the first axis 141 of the fanblades 140 is perpendicular to the support plane 401, a point ofintersection of the first axis 141 of the air output assembly 100 and apaper surface is 142. The air output diameter D of the front housing 130a is the maximum air output distance of a front housing 130 a in avertical direction. It is to be noted that the air output diameter Dhere refers to the inner length of the front housing 130 and not theouter length of the front housing 130.

To further illustrate the air output diameter D, FIG. 7 is used as anexample for description. In this example, the air output boundary of thefront housing 130 a is basically circular, that is to say, the firstdiameter D1 of the inner side of the front housing 130 a along an up anddown direction is basically equal to the second diameter D2 of the innerside of the front housing 130 a along a left and right direction. Here,“basically equal” is defined as follows: the ratio of the differencebetween the first diameter D1 of the inner side of the first housing 130a along the up and down direction and the second diameter D2 of theinner side of the first housing 130 a along the left and right directionto the larger value between the first diameter D1 and the seconddiameter D2 is less than or equal to 10%. That is to say, if the airoutput area of the front housing 130 is not a perfect circle, forexample, the air output area of the front housing 130 is elliptical orin other shapes, as long as the ratio of the difference between thefirst diameter D1 and the second diameter D2 to the larger value betweenD1 and D2 is less than or equal to 10%, it is considered that the fronthousing 130 satisfies that D1 is basically equal to D2. In this case,the first diameter D1 is used as the air output diameter D.

As shown in FIG. 6 , the distance between the second axis 201 of thepivot assembly 200 and the first axis 141 of the air output assembly 100is a first distance L1, and the first distance L1 is greater than orequal to one-fourth of the air output diameter D. In an example, thefirst distance L1 is greater than or equal to one-third of the airoutput diameter D. In an example, the first distance L1 is greater thanor equal to half of the air output diameter D. That is to say, in anexample, the ratio of the first distance L1 to the air output diameter Dis greater than or equal to 25%. In an example, the ratio of the firstdistance L1 to the air output diameter D is greater than or equal to33%. In an example, the ratio of the first distance L1 to the air outputdiameter D is greater than or equal to 50%.

In addition, the maximum width of the air output assembly 100 in theleft and right direction is a second distance L2, and the maximum widthof the support assembly 400 in the left and right direction is a thirddistance L3, where the second distance L2 is greater than or equal tothe third distance L3. The second distance L2 may be the maximumdistance of the front housing 130 in the left and right direction or themaximum distance of the rear housing 150 in the left and rightdirection. In an example, the second distance L2 is 1 to 1.2 times thethird distance L3. In an example, the second distance L2 is about 1.1times the third distance L3. Such a proportional relationship makes thefan 10 “long and thin” in shape so that the fan 10 in use requires lessstanding area, thereby saving space.

The overall height of the fan 10 is a first height H1, and the firstheight H1 is about twice the third distance L3. In an example, the firstheight H1 is less than twice the third distance L3. The first height H1is about 1.4 to 1.8 times the second distance L2. In an example, thefirst height H1 is about 1.6 times the second distance L2. In thismanner, the part of the fan 10 with the maximum distance in the left andright direction is at the air output assembly 100, the air outputassembly 100 is used for actually doing work to output the airflow, andthe pivot assembly 200, the battery pack coupling portion 300, and thesupport assembly 400 are used for exciting and keeping the continuousair output from the air output assembly 100. Therefore, as shown in FIG.6 , an area occupied by the air output assembly 100 may be regarded asan effective area, and the fan 10 disclosed in the present applicationhelps to increase the ratio of the effective area of the fan 10 to atotal area. The fan 10 has a higher space utilization rate and can beadapted to more usage conditions and working conditions.

In an example, the grip 110 of the fan 10 may be configured to be apivotable structure, that is, the grip 110 is pulled up when needed foruse and lowered when not needed. Therefore, FIG. 6 further defines asecond height H2 excluding the top grip 110, and the second height H2 isthe distance between the topmost part of the housing of the air outputassembly 100 and the support plane 401. In an example, the second heightH2 is 0.85 to 0.95 times the first height.

The distance between the second axis 201 of the pivot assembly 200 ofthe fan 10 and the support plane 401 is a third height H3, and the ratioof the first height H1 to the third height H3 is greater than or equalto 2.5 and less than or equal to 4.7. In some examples, the ratio of thefirst height H1 to the third height H3 is greater than or equal to 3.0and less than or equal to 3.5. When the ratio of the first height H1 tothe third height H3 is too small, the height of the second axis 201 istoo high, affecting the position of the center of gravity of the wholemachine; and when the ratio of the first height H1 to the third heightH3 is too large, the second axis 201 is too close to the support plane401, affecting the distance between the battery pack 310 and the groundwhen the battery pack 310 rotates.

As shown in FIG. 8 , a region formed by the support members 410 isbasically trapezoidal. The support assembly 400 includes the firstsupport member 411 and the second support member 412 that are located inthe front row and the third support member 413 and the fourth supportmember 414 that are located in the rear row. The maximum width betweenthe first support member 411 and the second support member 412 along theleft and right direction is the third distance L3, and the maximum widthbetween the third support member 413 and the fourth support member 414along the left and right direction is a fourth distance L4. The thirddistance L3 is greater than or equal to the fourth distance L4.

In conjunction with FIGS. 6 and 8 , when viewed from the front, thecenter of gravity of the fan 10 may fall on the lower side of the airoutput assembly 100, at the pivot assembly 200, or at the battery packcoupling portion 300. When viewed upward from the bottom, the center ofgravity of the fan 10 falls within a region of the battery pack couplingportion 300.

In an example, the maximum width of the support assembly 400 in the leftand right direction is the third distance L3 and may also be the maximumwidth between the third support member 413 and the fourth support member414 along the left and right direction. The maximum width of the supportassembly 400 in a front and rear direction is a fifth distance L5. Inthis example, the fifth distance L5 is basically equal to the thirddistance L3. Table two describes an example of the preceding parameters.

TABLE 2 L1 L2 L3 L4 L5 H1 H2 H3 D1 D2 Unit (mm) 222 439 392 347 398 710655 213 361 368

As described in the preceding table, a support area of the fan 10 isdefined as an area of a region enclosed by all the support members 410of the support assembly 400. In this example, the support area is anarea of a trapezoid. According to the trapezoid area formula, thesupport area in this example is 0.147 m².

FIGS. 9 to 16 further disclose the effects that can be achieved byrotating the air output assembly 100 of the fan 10 around the pivotassembly 200.

FIG. 9 shows a right view of FIG. 1 . At the position shown in FIGS. 1and 9 , the first axis 141 of the fan blades 140 of the air outputassembly 100 is parallel to a placement plane 402 on which the fan 10 isplaced, and the placement plane 402 basically coincides with the supportplane 401 formed by the support assembly 400. As shown in FIG. 10 , whenthe fan 10 shown in FIG. 9 is placed on an inclined plane, a projectionof the center of gravity of the fan 10 on the support plane 401 fallswithin a range formed by the support members of the support assembly400. At this time, an angle between the placement plane 402 on which thefan 10 is placed and the horizontal plane is a first angle α. Theminimum value of the first angle α is zero degrees (that is, theplacement plane 402 is parallel to the horizontal plane), and themaximum value of the first angle α is greater than or equal to 10degrees. In some examples, the angle between the placement plane 402 andthe horizontal plane may be 12 degrees, 14 degrees, or 16 degrees, andat these angles, the fan 10 can be placed stably without tipping over.

As shown in FIGS. 11 and 12 , the air output assembly 100 rotatesbackward around the pivot assembly 200. In this example, the air outputassembly 100 can rotate backward up to 90 degrees. During the rotationof the air output assembly 100 from the position shown in FIG. 9 to theposition shown in FIG. 12 , the projection of the center of gravity ofthe fan 10 on the support plane 401 always falls within the range formedby the support members of the support assembly 400.

As shown in FIGS. 13 and 14 , the air output assembly 100 rotatesforward around the pivot assembly 200. In this example, the air outputassembly 100 can rotate forward up to 90 degrees. During the rotation ofthe air output assembly 100 from the position shown in FIG. 9 to theposition shown in FIG. 14 , the projection of the center of gravity ofthe fan 10 on the support plane 401 always falls within the range formedby the support members of the support assembly 400.

In addition, as shown in FIGS. 15 and 16 , when the air output assembly100 of the fan 10 rotates by a certain angle, the fan 10 can still bedisposed on a surface with a certain slope without tipping over. Thefirst angle α between the placement plane 402 on which the fan 10 isplaced and the horizontal plane is at least 10 degrees and the fan 10does not tip over. In the case shown in FIG. 15 , the center of gravityof the fan 10 is located to the right of a first straight line 101perpendicular to the horizontal plane, where the first straight line 101passes through the foremost edge of the support members 410 in the frontrow. In the case shown in FIG. 15 , the center of gravity of the fan 10is located to the left of a second straight line 102 perpendicular tothe horizontal plane, where the second straight line 102 passes throughthe foremost edge of the support members 410 in the front row.

In conjunction with FIGS. 11 to 16 , the angle between the first axis141 of the air output assembly 100 and the support assembly 401 isgreater than or equal to 0 degrees and less than or equal to 90 degrees.

It is to be noted that the preceding case where the fan 10 does not tipover when placed on the placement plane 402 inclined to the horizontalplane includes not only the case where the battery pack 310 is mountedin the battery pack coupling portion 300 but also the case where thebattery pack 310 is not mounted in the battery pack coupling portion300, that is, when the battery pack 310 is not mounted in the fan 10.Similarly, the case where the fan 10 does not tip over when the airoutput assembly 100 rotates forward or backward and is placed on thesupport plane 401 inclined to the horizontal plane means that the fan 10does not tip over whether or not the battery pack 310 is mounted in thefan 10.

When the air output assembly 100 rotates about the second axis 201, thebattery pack coupling portion 300 rotates together, and the direction ofrotation of the air output assembly 100 is just opposite to thedirection of rotation of the battery pack coupling portion 300. Inaddition, the ratio of the first distance L1 to the air output diameterD is greater than or equal to 25%. With such a structure and specificparameter settings, the fan 10 can be placed stably and the projectionof the center of gravity of the fan 10 on the support plane 401 fallswithin the region enclosed by the support members 410 in variousplacement cases where the battery pack 310 is mounted in the fan 10, thebattery pack 310 is not mounted in the fan 10, the support plane 401 ishorizontal, the support plane 401 is inclined to the horizontal plane,or the air output assembly 100 rotates by a certain angle relative tothe support plane 401.

In addition, the battery pack 310 disclosed in the present applicationmay be inserted into the fan 10 from front to back and is convenient forthe operator to mount and replace. When the fan 10 is placed as shown inFIG. 9 , the battery pack 310 is located at least partially on the frontside of the second axis 201 and partially on the rear side of the secondaxis 201. This arrangement is more conducive to the balance of the wholemachine.

The fan disclosed in the present application can be adapted to varioususage cases and has a unique appearance. The fan in use saves the spaceoccupied by the support assembly 400 and can “stand” stably when placedat different angles. When the fan 10 is in a folded state shown in FIG.12 or 14 , the fan 10 saves space and is easy to store.

The basic principles, main features, and advantages of the presentapplication are shown and described above. It is to be understood bythose skilled in the art that the preceding examples do not limit thepresent application in any form, and all technical solutions obtainedthrough equivalent substitutions or equivalent transformations fallwithin the scope of the present application

What is claimed is:
 1. A fan, comprising: a battery pack couplingportion for mounting a battery pack; an air output assembly comprisingfan blades, a front housing located on a front side of the fan blades,and a rear housing located on a rear side of the fan blades, wherein thefan blades are driven by a motor to rotate about a first axis, anairflow flows out from the front housing, and the airflow flows in fromthe rear housing; a pivot assembly connected to the air output assembly,wherein the air output assembly is rotatable about a second axis of thepivot assembly; and a support assembly connected to the pivot assembly,wherein the support assembly is capable of supporting the air outputassembly; wherein a maximum distance of the front housing available forair output in an up and down direction is defined as an air outputdiameter of the fan, a distance between the first axis and the secondaxis is defined as a first distance, and a ratio of the first distanceto the air output diameter is greater than or equal to 25%.
 2. The fanof claim 1, wherein the ratio of the first distance to the air outputdiameter is greater than or equal to 33%.
 3. The fan of claim 1, whereinthe pivot assembly is connected to a bottom of the air output assembly,and the second axis is located on a lower side of the air outputassembly.
 4. The fan of claim 1, wherein the pivot assembly is at leastpartially located between the air output assembly and the battery packcoupling portion.
 5. The fan of claim 1, wherein the support assemblycomprises a support rod and a support member, the support rod isconnected to the pivot assembly, and the support member supports thesupport rod so that the fan is capable of being placed on a placementplane.
 6. The fan of claim 5, wherein the support assembly comprisesfour support members and, when the fan is placed on the placement plane,a projection of a center of gravity of the fan on the placement planefalls within a region enclosed by the four support members.
 7. The fanof claim 1, wherein a maximum width of the air output assembly in a leftand right direction is defined as a second distance, a maximum distanceof the support assembly in the left and right direction is defined as athird distance, and the second distance is greater than the thirddistance.
 8. The fan of claim 1, wherein a rated voltage of the batterypack is greater than or equal to 36 V and less than or equal to 56 V. 9.The fan of claim 1, wherein a weight of the battery pack is greater thanor equal to 0.8 kg and less than or equal to 2.5 kg.
 10. The fan ofclaim 9, wherein the battery pack adapted to the fan is also adaptableto other types of power tools other than the fan.
 11. The fan of claim1, wherein the battery pack is capable of being mounted into the batterypack coupling portion from front to back.
 12. The fan of claim 1,wherein the battery pack is at least partially located on a front sideof the second axis when the battery pack is mounted in the fan.